US 12,359,102 B2
Hot melt adhesive composition
Olivier Laferte, Venette (FR); Clement Bellini, Venette (FR); and Urszula Duplaga, Venette (FR)
Assigned to BOSTIK SA, Colombes (FR)
Appl. No. 17/785,128
Filed by BOSTIK SA, Colombes (FR)
PCT Filed Dec. 17, 2020, PCT No. PCT/EP2020/086783
§ 371(c)(1), (2) Date Jun. 14, 2022,
PCT Pub. No. WO2021/123000, PCT Pub. Date Jun. 24, 2021.
Claims priority of application No. 19306715 (EP), filed on Dec. 20, 2019.
Prior Publication US 2022/0396720 A1, Dec. 15, 2022
Int. Cl. C09J 123/22 (2006.01); B32B 7/12 (2006.01); B32B 27/32 (2006.01); B32B 27/34 (2006.01); B32B 27/36 (2006.01); C09J 5/06 (2006.01); B32B 5/02 (2006.01)
CPC C09J 123/22 (2013.01) [B32B 7/12 (2013.01); C09J 5/06 (2013.01); B32B 5/022 (2013.01); B32B 27/32 (2013.01); B32B 27/34 (2013.01); B32B 27/36 (2013.01); B32B 2255/02 (2013.01); B32B 2255/10 (2013.01); B32B 2255/26 (2013.01); B32B 2270/00 (2013.01); B32B 2555/02 (2013.01); C09J 2423/00 (2013.01)] 20 Claims
 
1. Hot melt adhesive composition having an enthalpy of crystallization below 5 J/g and comprising:
a) at least 60% by weight of a composition a) comprising:
at least one copolymer A having a needle penetration higher than 15 dmm, wherein the copolymer A comprises from 40 weight % to 80 weight % of 1-butene monomer units; and
at least (co)polymer B having a needle penetration lower than 15 dmm, wherein the (co)polymer B comprises from 40 weight % to 80 weight % of 1-butene monomer units; and
b) from 0% to 30% by weight of at least one tackifying resin.